Opening and closing device for turning-tools.



A. M. GYDESENY.

OPENING AND CLOSING DEVICE FOR TURNING TOOLS.

APPLICATION FILED APR. I0, I9I4.

- Patented June 20, 1916.

4 SHEETSSHEET I.

I II

Qwi/Weooao THE COLUMBIA PLANcmR/mu C0 WASHINGTON, D. C-

A. M. GYDESEN.

OPENING AND CLOSING DEVICE FOR TURNING TOOLS.

APPLICATION FILED AFN. 10. I914.

Patented June 20, 1916.

4 SHEETSSHEET 2.

A. M. GYDESEN.

OPENING AND CLOSING DEVICE FOR TURNING TOOLS.

APPLICATION FILED APR. IO, I9I4.

Patented June 20, 1916.

4 SHEETS-SHEET 3- THE coLummA PLANOGRAPII c0 \VASHINGTON- n. c.

A. M. GYDESEN.

OPENING AND CLOSING DEVICE FOR TURNING TOOLS.

Patented June 20, 1916.

m APPLICATION FILED APR. 10, I914. I m 9 3w I L 4 SHEETS-SHEET 4.

'IHF. COLUMBIA PLANOGRAPH 00., WASHINGTON, n. c. I

OPENING- AND CLOSING DEVICE FOR TURNING-TOOLS.

Specification of Letters Patent.

Patented June 26 1916.

Application filed April 10, 1914. Serial No. 831,078.

To all whom it may concern Be it known that l, ALFRED M. GYnnsnN, a citizen of the United States, and resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements 1n Opening and Closing Devices for Turning-Tools, of which the following 1s a speciiication.

This invention relates to new and useful improvements in means for automatically opening and closing turning or box tools with roller back rests, such as are used on certain forms of turning machines.

It is the object of the invention to provide a tool of the above class which will serve to hold the cutter in operative position for a given length of time and during the cutting or turning of a piece of work, but which will be automatically operated and the cutting tool withdrawn from engagement with the work at the completion of such operation and further to allow the tool to be carried back free, to the point of beginning; to provide a device of the class specified which can be applied to various forms of commercial box tools now upon the market with comparatively little bother and expense; to in this manner provide a tool of the class specified which will be antomatic in its operation and which will not require the close and constant attention of the operator which is necessary with the present form of hand operated tools.

My invention may obviously be carried into eifect with diii'erentforms of constructions and therefore I do not wish to be limited to the particular design or arrangement of mechanism shown in either of the accompanying drawings except as required by the claims, since I believe it to be sufficiently broad in scope to cover any and all of the constructions illustrated.

Upon the accompanying four sheets of drawings forming a part of this specification similar charactersof reference will be found to designate like or corresponding parts throughoutthe several figures and of which- Figure 1 shows a front elevation of a cutting tool of the class designated, and provided with my improved automatic attachment. Fig. 2 is a detail plan view of the automatic attachment as it appears in Fig. 1. Fig. 3 is a sectional elevation taken on line 33 of Fig. 1. Fig. 1 is a central vertical sectional view reading with Fig. 3, though taken through the operating screw and indicated on Fig. 2 by line 4-4:. Figs. 5 and (3 show a detached plan and side view respectively of a modified form of my invention. Figs. 7 and 8 show a detached side view and a plan respectively of a further modification of the invention, and Figs. 9 and 10 show a still further manner of carrying my invention into effect.

Referring in detail to the characters of reference marked upon the drawings 12 represents the main body of the cutting tool which is provided with a central opening 13 therethrough. The guide rolls 1l14 for engaging the stock to be turned are carried in separate and adjustable dovetail blocks 15.

1G designates a cutter that is detachably mounted in a holder 17 fitted on a suitable way 18 formed on the end or face of the body. This holder includes an inwardly disposed arm or extension 19 that is engaged by an adjusting screw 20 threadably mounted in the top portion of the body. The said arm is provided with a hole in which is mounted a bushing 21 through which the screw passes, and the screw is provided with a fixed collar 22 against which the upper face of the arm bears while a nut 23 threadably attached to the screw serves to engage the under side of the arm. Thus the screw is free to turn in the arm 19 and in a manner to draw the arm and holder up and down for the purpose of vertically adjusting the cutter 16 carried in the holder 1? fitted in the ways on the end of the body, all of which will later be more fully explained. The cutter as will be noted is mounted in its holder so that the cutting point will be brought to register and bear upon the peripheral face of the cylindrical piece. of work 2% when arranged through the open ing 18 of the body. In practice these cutting tools are secured to and supported on the shank 25 which in turn is suitably held in a turning machine. When in operation this arbor and cutting tool are moved forward longitudinally so that the cutter 16 will be guided along the periphery of the work to be finished, in the usual or any preferred manner.

Referring more particularly to the novel features of the device it will be noted that I employ a gear rack 26 that is fixed and stationary, and which is engaged by a gear 27 that is frictionally secured to the before mentioned screw 20 adjustably mounted in the body of the cutting tool so that as the gear and screw are turned in one direction or the other the said arm and cutter holder are moved up or down, as for instance when the'arloor'25. and its attached cutter body 12 are moved forward the gear 27 upon the screw 20 immediately begins to turn by reason ofits engagement with thestationary gear rack 26. In practice the first forward movement of this gear 27 serves to turn the screw down into the body which lowers the cutter holder 17 down in position for operation. Upon the unthreaded portion 20 of the screw 20 is securely mounted an arm 28 which also simultaneously moves with the movement of the gear and screw and is thus per threaded portion of the screw 20 are mounted a clamping nut 32 and lock nut 33 which serve to permit of an adjustment of the amount of friction against the gear. The

- extreme upper end of the screw is provided with a handle 3 1' which obviously allows for a hand operation or adjustment of the parts.

d When the end of the cut is reached and the tool starts to return, the movement of the gear and 1138' screw is reversed, which movement obviously serves to raise the cutter the beginning ting operation.

away from the work and allow the cutting tool to return free to place'of beginning. It will thus be seen that I provide an automatic device for operating the cutter holder at and completion of each cut- The modifications shown in the other figures are more or less similar and serveto automatically accomplish the same results.

As for instance in Figs. 5 and 6 I use a cam 35 for throwing. the cutter slide 17 in, and a spring 36 for lifting it out of operation. Notethat the said cam is mounted upon a short cross shaft 37 secured in uprights 38 attached to the body, The spring 36 is arranged upon the screw and intermediate of the arm 19 and body 12. A finger 39 is disposed outward from the cam and is arrangedin alinement with the contact pins LO- 10 on a rack 26*. This member is ob viously fixed to the machine and in a man i ner serves the same purpose as the rack gear 26, to operate the screw and set the cutter in against the work at one end, and to draw it away at the other end. The same is true of the construction shown in Figs. 7

and 8 where I use a pair of stop pins 10 that engage a pin 41 on a disk 12 frictionally mounted upon the screw 20 and that takes the place of the gear 27.

In Figs. 9 and 10 it will be noted that I use the friction gear 27 for turning the screw and moving the cutter holder, but employ a somewhat different means for limiting the screw, as for instance upon the screw are arranged spaced collars 43- 13 and upon the body is secured a bracket 14 having a slotted end that extends past the screw and between the said collars. This form of device would 7 obviously be used in connection with a rack as shown in Fig. 2 and would serve to provide the movements of the screw and cutter holder at each end of the travel of the tool.

Having thus described my invention what I claim and desire to secure by Letters Patent is 1. In a device of the class described, the combination with a turning tool including a cutter, of means for closing the cutter with the beginning of a cutting operation, said means comprising a feeding screw for the holder of said cutter, and a frictional gear and rack connection for said feeding screw, and means for opening said cutter at the completion of a cutting operation.

2. In a device of the class described, the combination with a turning tool adapted to be moved backward and forward and including a cutter, of means for closing the cutter with the preliminary cutting operation, and means for opening the cutter with the beginning of the return movement of the tool, said latter means comprising a feeding screw for the holder of saidcutter, a frictional gear and rack connection for said feeding screwfand an arm rigidly applied to the unthreaded portion of said screw, and controlling stops for said arm.

3. The combination with a turning tool including a cutter, of means for automatically feeding the cutter into operative position, said meanscomprising a feeding screw for the holder of said cutter, a frictional gear and rack-connection for said feeding screw, means for limiting the amount of such feed consisting of an arm carried by said screw, and stops equipped with adjusting or limiting screws for said arm, and means for automatically returning said cutter'to a position of rest.

4. In a device of the class described, the combination with a turning tool adapted to be moved backward and forward and including a cutter, a fixed rack, of means for engaging the rack for closing the cutter with the preliminary cutting operation and for opening the cutter with the beginning of the return movement of the tool, said means comprising a feeding screw for the holder of said cutter, a gear frictionally mounted upon said feeding screw and arranged to mesh with said rack.

5. The combination with a turning tool including a cutter and holder, of a screw to engage the holder, a rotatable member frictionally mounted on the screw for automatically feeding the cutter into operative position, means for limiting the amount of such feed, and means for automatically returning said cutter to a position of rest.

6. The combination with a turning tool including a cutter, of a screw for feeding the cutter into and out of operative position, fixed means for operating the screw, an arm upon the screw for limiting the amount of the turn of the screw, and adjustable stops for the said arm.

7. The combination with a turning tool including a cutter, a rack, a screw for moving the cutter in and out of operative position, a gear upon the screw and engaged by the rack to impart a preliminary movement to the screw, and means for limiting the amount of movement of the said screw and cutter.

8. In a device of the class described, the combination of a fixed rack, a turning tool including a cutter and holder adapted to be moved along the rack, a screw to engage the holder for closing the cutter with the beginning of a cutting operation, a member frictionally held upon the screw and adapted to be operated by the rack, means for regulating the amount of the movement of the screw, and means for reversing the movement of the screw at the completion of a cutting operation.

9. The combination with a turning tool including a cutter and holder, of a screw to engage the holder, a rotatable member frictionally mounted in the screw for automatically feeding the cutter into operative position, a rack to engage and operate the rotary member, means for limiting the amount of such movement, and means for automatically returning said cutter to a position of rest. r

10. The combination with a turning tool including a cutter holder, of a screw that engages the cutter holder to feed it into and out of operative position, a rack for operating the screw, an arm upon the screw for limiting the amount of the turn of the screw, and adjustable stops for the said arm. 11. A turning tool including a cutter, a fixed rack, a screw for moving the cutter in and out of operative position, a gear frictionally mounted upon the screw and engaged by the rack to impart a preliminary movement to the screw, and adjustable means for varying the amount of movement of said screw and cutter.

Signed at Bridgeport in the county of Fairfield and State of Connecticut this 6th day of April, A. D. 1914.

ALFRED M. GYDESEN.

Witnesses:

G. M. NEWMAN, RUTH M. WORDEN.

flame-a or thla patent may be obtained for five cents each, by addressing the commissioner at Iratenta,

Wilmington, D. C. 

